Generate parameters of reaches.
This script should be updated with the following files/code simultaneously.\n
1. seims/preprocess/database/model_param_ini.csv: Emend initial parameters;\n
2. seims/src/seims_main/base/data/clsReach.h(.cpp): Update the reading and checking of data.
@author : Liangjun Zhu, Junzhi Liu
@changelog: 16-12-07 lj - rewrite for version 2.0
17-06-23 lj - reorganize as basic class
18-02-08 lj - compatible with Python3.\n
18-08-13 lj - add erosion related parameters according to readrte.f of SWAT.\n